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Juvenile Pintail duck from books.google.com
The bestselling natural history of birds, lavishly illustrated with 600 colorphotos, is now available for the first time in flexi binding.
Juvenile Pintail duck from books.google.com
... juvenile of the year or an adult bird . Proceed as follows : ( a ) If the tip of the tail - feather is normally ... Pintail and Wood Duck , all juveniles probably wear the juvenile tail until late in August ; all Mallards and Black ...
Juvenile Pintail duck from books.google.com
... juvenile mortality must take into considera- tion all factors that destroy eggs , nests , fe- males , or ducklings ... pintail females to move their broods from pond to pond and to send them scattering to the uplands at the first ...
Juvenile Pintail duck from books.google.com
... Female Male Local Local Adult Juvenile Adult Juvenile Male Female Female Unclass- Total ified Mallard 8 11 1 1 21 Gadwall 7 10 1 18 Baldpate 4 2 6 Redhead 7 13 1 16 1 8 4 50 Ruddy duck 3 3 Pintail 8 9 58 1 24 1 93 Total 26 39 10 75 2 33 ...
Juvenile Pintail duck from books.google.com
... juvenile Pintail hens , for example , 13 per cent came back to Delta to be individually recorded ( by leg bands ) on the small pond where they were raised . Sowls discovered the nests of 8 of these young females only a short distance ...
Juvenile Pintail duck from books.google.com
... duck . Ecological Modelling 38 : 257-275 . Kirsch , L. M. , H. F. Duebbert , and A. D. Kruse . 1978 . Grazing and ... juvenile , brood hen , and post - breeding pintails in North Da- kota . Condor 79 : 504-507 . Lokemoen. ,. J. T ...
Juvenile Pintail duck from books.google.com
... Duck , mallard . 209. Ducks , pintail . 212. Ducks , pintail , juvenile . 217. Ducks , ruddy . 202. Duck , wood . 202a . Duck , wood . 214. Ducks , Alameda County Infirmary Reservoir , winter of 1914 . 215. Ducks on pond at State Game ...
Juvenile Pintail duck from books.google.com
... juvenile mortality must take into considera- tion all factors that destroy eggs , nests , fe- males , or ducklings ... duck has survived the egg- laying and incubating periods , has hatched her eggs , and has led the ducklings ...